Table 3 Pearson moment correlation between taxonomic indices (species numbers = S, Simpson index = d, Margalef index = D, Shannon-Wiener index = H′, Pielou evenness index = J) and each environmental factor (WT = water temperature, SD = Secchi disc, Chl-a = Chlorophyll-a) in Lake Jinghu and Lake Xiyanghu.

WT (°C)

0.44**

0.53**

0.33*

0.60**

0.44**

0.61**

0.48**

0.44**

0.53**

−0.23

pH

0.02

0.16

0.12

0.19

0.28

0.14

0.12

0.09

0.17

0.09

SD (m)

−0.20

−0.18

0.07

−0.21

−0.15

−0.27

−0.14

0.06

−0.15

0.17

Chl-a (µg/L)

−0.05

0.05

−0.24

0.004

0.06

−0.05

−0.09

−0.19

−0.14

−0.12

TP (mg/L)

0.68*

0.52

0.56

0.60*

0.40

−0.20

−0.13

−0.02

−0.14

0.11

PO₄ ³⁻ (mg/L)

0.73**

0.75**

0.65**

0.82**

0.64*

0.04

0.41

0.32

0.39

0.53

TN (mg/L)

0.003

0.19

0.04

0.20

0.23

−0.49

−0.25

−0.09

−0.40

0.30

NO₃ ⁻-N (mg/L)

−0.07

−0.38

0.11

−0.38

−0.44

−0.02

−0.05

0.03

−0.12

−0.21

NH₄ ⁺-N (mg/L)

−0.09

−0.39

−0.15

−0.28

−0.29

−0.70**

−0.72**

−0.76**

−0.77**

−0.11

Cladocera (ind./L)

0.15

0.17

0.06

0.24

0.20

0.41*

0.36*

0.37*

0.40*

0.02

Copepoda (ind./L)

0.27

0.25

0.21

0.28

0.16

0.17

0.23

0.06

0.17

0.09

Naupii (ind./L)

0.20

0.18

0.10

0.23

0.13

0.14

0.24

0.03

0.10

0.07